Table 1.
Details of included studies (case series and cohort)
| Author | Date of publication | Country | Study design | Study quality | Pregnant women (n) | Gestational age (weeks) | Vaginal delivery (total delivered) | Live births (n) | Preterm, n (%) | Birth weight (g) | Neonates tested(n) | COVID- positive neonates |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Breslin et al. [14] | 9 April 2020 | USA | Retrospective | Fair | 43 | 37 (32–38)a | 10 (18) | 18 | 1 (5) | – | 18 | 0 |
| Buonsenso et al. [15] | 21 April 2020 | Italy | Observational | Poor | 7 | 8–37b | 0 (2) | 2 | 1 (50) | 2300, 3390 | 2 | 2 |
| Campbell et al. [46] | 26 May 2020 | USA | Case series | Poor | 30 | Term | 20 (30) | 30 | 0 | 3370 (621)c | 30 | 0 |
| Cao et al. [16] | 10 April 2020 | China | Retrospective | Fair | 10 | 33–40b | 2 (10) | 11 | 4 (36) | 2050–3800b | 4 | 0 |
| Chen et al. [3] | 12 February 2020 | China | Retrospective | Fair | 9 | 36–39b | 0 (9) | 9 | 4 (44) | 1880–3730b | 6 | 0 |
| Chen et al. [17] | 16 March 2020 | China | Case series | Poor | 4 | 37–39b | 1 (4) | 4 | 0 | 3050–3800b | 3 | 0 |
| Chen et al. [18] | 28 March 2020 | China | Observational | Fair | 5 | 38–41b | 3 (5) | 5 | 0 | 3235–4050b | 5 | 0 |
| Chen et al. [19] | 17 April 2020 | China | Retrospective | Poor | 118 | – | 5 (68) | 68 | 14 (21) | – | 8 | 0 |
| Chen et al. [20] | 10 March 2020 | China | Case series | Poor | 17 | – | 0 (17) | 17 | 3 (18) | – | 0 | 0 |
| Chen et al. [21] | 08 May 2020 | China | Case series | Poor | 3 | – | 0 (2) | 2 | 1 (33) | – | 2 | 0 |
| Fan et al. [22] | 17 March 2020 | China | Case series | Fair | 2 | 36–37b | 0 (2) | 2 | 0 | 2890, 3400 | 2 | 0 |
| Ferrazzi et al. [23] | 07 April 2020 | Italy | Retrospective | Fair | 42 | – | 24 (42) | 42 | 11 (26) | 840–4040b | 42 | 3 |
| Govind et al. [24] | 07 May 2020 | England | Observational | Fair | 9 | 36.8 (27–39)a | 1 (9) | 9 | 7 (78) | – | 9 | 1 |
| Hernández et al. [47] | 05 June 2020 | Spain | Case series | Good | 3 | 39 | – (3) | 3 | 1 (33) | 1135–3700b | 3 | 3 |
| Hantoushzadeh et al. [25] | 24 April 2020 | Iran | Case series | Fair | 9 | 32.7 (28–38)a | 0 (5) | 6 | 5 (83) | 1180–3200b | 6 | 1 |
| Hirshberg et al. [26] | 01 May 2020 | USA | Case series | Fair | 5 | 25–31b | 0 (3) | 3 | 3 (100) | 1500–2110 | 3 | 0 |
| Huang et al. [27] | 08 May 2020 | China | Retrospective | Poor | 8 | 28–39b | 1 (6) | 6 | 3 (50) | 1520–4200b | 6 | 0 |
| Kayem et al. [44] | 31 May 2020 | France | Case series | Poor | 617 | 22–37b | 94 (181) | 190 | 50 (28) | – | 190 | 2 |
| Khan et al. [28] | 19 March 2020 | China | Case series | Fair | 3 | 34–39b | 3 (3) | 3 | 1 (33) | 2890–3730b | 3 | 0 |
| Khan et al. [48] | 27 March 2020 | China | Case series | Fair | 17 | 35–41b | 0 (17) | 17 | 3 (18) | 2300–3750b | 17 | 0 |
| Knight et al. [49] | 08 June 2020 | UK | Case series | Fair | 427 | 38 (36–40)a | 106 (253) | 259 | 63 (24) | – | 259 | 12 |
| Li et al. [45] | 30 March 2020 | China | Case–control | Good | 16 | 38 (0.2)a | 3 (16) | 17 | 4 (23) | 3066 (560)c | 3 | 0 |
| Liao et al. [29] | 29 April 2020 | China | Retrospective | Good | 10 | 38 (1.43)a | 10 (10) | 10 | 1 (10) | 3283 (449)c | 7 | 0 |
| Liu et al. [30] | 27 February 2020 | China | Retrospective | Fair | 13 | 32–38b | 0 (10) | 10 | 7 (70) | – | 9 | 0 |
| Liu et al. [31] | 17 March 2020 | China | Observational | Fair | 10 | 38 (1.5)c | 1 (10) | 10 | 2 (20) | 3293 (425)c | 10 | 0 |
| Liu et al. [32] | 07 March 2020 | China | Retrospective | Poor | 15 | 37 (1)c | 1 (11) | 11 | – | – | 11 | 0 |
| Martinez-Perez et al. [50] | 08 June 2020 | Spain | Case series | Poor | 82 | – | 41 (82) | 82 | 25 (30) | 910–4750b | 82 | 5 |
| Ochiai et al. [51] | 04 June 2020 | Japan | Case series | Poor | 52 | 38 | 0 (2) | 2 | 0 | 3715, 2805 | 2 | 0 |
| Pereira et al. [5] | 22 May 2020 | Spain | Observational | Good | 60 | 32 (5–41)a | 18 (23) | 23 | 2 (9) | – | 23 | 0 |
| Pierce-Williams et al. [33] | 04 May 2020 | USA | Cohort | Good | 64 | 34 (4.2)c | 8 (32) | 32 | 19 (59) | 2403 (858)c | 33 | 1 |
| Qadri and Mariona [52] | 20 May 2020 | USA | Case series | Poor | 16 | 22–40b | 8 (12) | 12 | 1 (8) | 2830–4215b | 12 | 0 |
| Qiancheng et al. [34] | 22 April 2020 | China | Retrospective | Fair | 28 | 38 (36–39)a | 5 (22) | 23 | 1 (4) | 2915–3390b | 22 | 0 |
| Salvatori et al. [35] | 15 May 2020 | Italy | Case series | Fair | 2 | 39–41b | – (2) | 2 | 0 | 3120, 4440 | 2 | 2 |
| Sun et al. [36] | 19 April 2020 | China | Case series | Fair | 3 | 31–37b | 0 (3) | 3 | 2 (67) | – | 3 | 1 |
| White et al. [53] | 04 June 2020 | USA | Case series | Good | 3 | 39 | 2 (3) | 3 | 0 | – | 2 | 2 |
| Wu et al. [37] | 05 May 2020 | China | Case series | Fair | 13 | 5–38b | 1 (5) | 5 | 2 (40) | 2300–3910b | 5 | 0 |
| Xu et al. [38] | 28 April 2020 | China | Retrospective | Fair | 5 | 34–39b | 4 (5) | 5 | 2 (40) | 2450–3760b | 5 | 0 |
| Yan et al [39] | 17 April 2020 | China | Retrospective | Good | 116 | 38.4 (37–39)a | 14 (100) | 100 | 21 (21) | 3108 (526)c | 86 | 0 |
| Yang et al [40] | 5 April 2020 | China | Prospective | Good | 7 | 36–38b | 0 (7) | 7 | 4 (57) | 2096 (660)c | 6 | 0 |
| Yu et al. [41] | 24 March 2020 | China | Retrospective | Fair | 9 | 39 (37–41)a | 0 (7) | 7 | 0 | 3000–3500b | 3 | 1 |
| Zeng et al. [7] | 26 March 2020 | China | Prospective | Poor | 6 | – | – (6) | 6 | – | – | 6 | 0 |
| Zeng et al. [42] | 26 March 2020 | China | Cohort | Fair | 33 | – | 0(33) | 33 | 4(12) | – | 19 | 3 |
| Zeng et al. [54] | 21 May 2020 | China | Case series | Poor | 16 | 37 (34–41)a | 4 (16) | 12 | 3 (25) | 3175 (478)c | 16 | 0 |
| Zhang et al [55] | 25 March 2020 | China | Case series | Good | 16 | 29 (2.9)c | 0 (10) | 10 | 1 (10) | – | 10 | 0 |
| Zhu et al. [43] | 10 February 2020 | China | Case series | Poor | 9 | 31–39b | 2 (9) | 10 | 5 (50) | 1720–3800b | 10 | 0 |
a
Median (IQR).
b
Range.
c
Mean (SD).